CN105139805B - A kind of pixel-driving circuit and its driving method, display device - Google Patents
A kind of pixel-driving circuit and its driving method, display device Download PDFInfo
- Publication number
- CN105139805B CN105139805B CN201510680325.3A CN201510680325A CN105139805B CN 105139805 B CN105139805 B CN 105139805B CN 201510680325 A CN201510680325 A CN 201510680325A CN 105139805 B CN105139805 B CN 105139805B
- Authority
- CN
- China
- Prior art keywords
- driver element
- transistor
- module
- signal end
- drive module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
Abstract
The embodiment of the present invention provides a kind of pixel-driving circuit and its driving method, display device, is related to display technology field, can improve due to the uneven bad phenomenon of display display brightness caused by threshold voltage.The pixel-driving circuit, including luminescence unit and at least one driver element, driver element include drive module, compensating module and initialization module.Luminescence unit connection driver element, first voltage end, second voltage end and the first signal end；Initialization module connection drive module, initial voltage end and the 4th signal end；Compensating module connection drive module, reference voltage end, scanning signal end, data voltage end and the 3rd signal end；Drive module is also connected with luminescence unit and secondary signal end.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of pixel-driving circuit and its driving method, display device.
Background technology
With rapidly improving for Display Technique, also flown therewith as the semiconductor component technology of display device core
The progress of jump property.For existing display device, Organic Light Emitting Diode (Organic Light Emitting
Diode, OLED) as a kind of current mode luminescent device, because of its self-luminous, quick response, wide viewing angle and it can make
On flexible substrates the features such as and be applied to more and more among high-performance display field.
OLED can be divided into PMOLED by type of drive, and (Passive Matrix Driving OLED, passive waked-up has
Machine light emitting diode) and AMOLED (Active Matrix Driving OLED, active matrix-driven organic light-emitting diode)
Two kinds, because there is displayer low manufacturing cost, high answer speed, power saving, the direct current available for portable set to drive
The advantages of dynamic, operating temperature range is big etc. and be expected to turn into substitution LCD (liquid crystal display, liquid crystal display)
Novel flat panel display of future generation.
In existing AMOLED display panels, each OLED include multiple TFT (Thin Film Transistor,
Thin film transistor (TFT)) on-off circuit.Yet with production technology and the characteristic of polysilicon, cause to make in large-area glass substrate
TFT switch circuit when, usually fluctuated on the electrical parameters such as threshold voltage vt h, mobility, so that flowing through
The change of conducting voltage stress produced by the electric current of OLED not only can for a long time be turned on TFT in AMOLED display panels
Change and change, and it can also be different with TFT threshold voltage vt h drifts.Thus, it will have influence on display
The brightness uniformity and brightness constancy of device.So as to reduce the picture quality and quality of display.
The content of the invention
Embodiments of the invention provide a kind of pixel-driving circuit and its driving method, display device, can improve due to
The uneven bad phenomenon of display display brightness caused by threshold voltage.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
There is provided a kind of pixel-driving circuit, including luminescence unit and at least one driving for the one side of the embodiment of the present invention
Unit, the driver element includes drive module, compensating module and initialization module；The luminescence unit connects the driving
Unit, first voltage end, second voltage end and the first signal end, in a frame in, in the driver element, described first
Lighted under the control of voltage end, the second voltage end and first signal end；The initialization module connects institute
Drive module, initial voltage end and the 4th signal end are stated, under the control of the 4th signal end, by described initial
Voltage end is initialized to the drive module；The compensating module connects the drive module, reference voltage end, scanning letter
Number end, data voltage end and the 3rd signal end, in the reference voltage end, the scanning signal end, data electricity
Under the control of pressure side and the 3rd signal end, the compensation of threshold voltage is carried out to the drive module；The drive module
The luminescence unit and secondary signal end are also connected with, under the control at the secondary signal end, driving the luminous list
Member is lighted.
It is preferred that, at least one described driver element includes the first driver element and the second driver element；Described first drives
Moving cell is used to drive the luminescence unit to be lighted in nth frame, wherein N >=1, is positive integer；Second driver element
For driving the luminescence unit to be lighted in N+1 frames；Wherein, the nth frame and the N+1 frames are adjacent two
Frame.
It is preferred that, the luminescence unit includes luminescent device and the first transistor；The anode connection institute of the luminescent device
First voltage end and the drive module are stated, the negative electrode of the luminescent device connects the drive module；The first transistor
Grid connect first signal end, the first pole connects the second voltage end, and the second pole is connected with the drive module.
It is preferred that, the drive module includes second transistor and third transistor；The grid of the second transistor connects
The compensating module is connect, the first pole connects the second pole of the third transistor, and the second pole is connected with the initialization module；
The grid of the third transistor connects the secondary signal end, and the first pole connects the first voltage end.
It is preferred that, the compensating module includes the 4th transistor, the 5th transistor, the 6th transistor and storage capacitance；
The grid of 4th transistor connects the scanning signal end, and the first pole connects the data voltage end, the second pole connection institute
State one end of storage capacitance；The grid of 5th transistor connects the scanning signal end, and the connection of the first pole is described with reference to electricity
Pressure side, the second pole connects the drive module；The grid of 6th transistor connects the 3rd signal end, the connection of the first pole
Second pole of the 5th transistor, the second pole connects one end of the storage capacitance；The other end connection of the storage capacitance
The drive module.
It is preferred that, the initialization module includes the 7th transistor；The grid connection the described 4th of 7th transistor
Signal end, the first pole connects the drive module, and the second pole is connected with the initial voltage end.
It is preferred that, the luminescent device is Organic Light Emitting Diode.
The another aspect of the embodiment of the present invention includes any one pixel driver as described above there is provided a kind of display device
Circuit.
The another aspect of the embodiment of the present invention is used to drive any one pixel-driving circuit as described above there is provided one kind
Method, methods described includes：In the first stage of a frame, the initialization module of driver element is opened, to the driver element
Drive module is initialized；In the second stage of a frame, the initialization module is closed, the compensating module pair of the driver element
The drive module carries out threshold voltage compensation；In the phase III of a frame, the initialization module is closed, the drive module
Driving luminescence unit is lighted.
It is preferred that, when at least one described driver element includes the first driver element and the second driver element, the drive
Dynamic method includes：In the first stage of nth frame, the initialization module of first driver element is opened, driven to described first
The drive module of unit is initialized, wherein N >=1, is positive integer；In the second stage of nth frame, first driver element
Initialization module close, the compensating module of first driver element carries out threshold to the drive module of first driver element
Threshold voltage is compensated；In the phase III of nth frame, the initialization module of first driver element is closed, and first driving is single
The drive module of member drives the luminescence unit to be lighted；At the beginning of the first stage of N+1 frames, second driver element
Beginningization module is opened, and the drive module to second driver element is initialized；It is described in the second stage of N+1 frames
The initialization module of second driver element is closed, the drive of the compensating module of second driver element to second driver element
Dynamic model block carries out threshold voltage compensation；In the phase III of N+1 frames, the initialization module of second driver element is closed,
The drive module of second driver element drives the luminescence unit to be lighted, wherein, the nth frame and the N+1
Frame is two adjacent frames.
The embodiment of the present invention provides a kind of pixel-driving circuit and its driving method, display device, the pixel driver electricity
Road includes luminescence unit and at least one driver element.The driver element includes drive module, compensating module and initialization mould
Block.Luminescence unit connection driver element, first voltage end, second voltage end and the first signal end, in a frame in, driving
Lighted under moving cell, first voltage end, the control of second voltage end and the first signal end.Initialization module connection driving
Module, initial voltage end and the 4th signal end, under the control of the 4th signal end, by initial voltage end to driving mould
Block is initialized.Compensating module connection drive module, reference voltage end, scanning signal end, data voltage end and the 3rd letter
Number end, under the control of reference voltage end, scanning signal end, data voltage end and the 3rd signal end, to drive module
Carry out the compensation of threshold voltage；Drive module is also connected with luminescence unit and secondary signal end, for the letter at secondary signal end
Number control under, driving luminescence unit lighted.
So, during driver element drives luminescence unit luminous in a frame time, initialization module can be with
Drive module is initialized, prepared so as to carry out threshold voltage compensation to drive module for compensating module.Compensating module
The compensation of threshold voltage can be carried out to drive module so that drive module flows through hair when driving luminescence unit to carry out luminous
The electric current of light unit is unrelated with the threshold voltage of transistor, so as to eliminate influence of the threshold voltage to luminosity, improves
The brightness uniformity and brightness constancy of display.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of pixel-driving circuit provided in an embodiment of the present invention；
Fig. 2 is the structural representation of the pixel-driving circuit of also included second driver element on the basis of Fig. 1；
Fig. 3 is the concrete structure schematic diagram of the pixel-driving circuit shown in Fig. 1；
Fig. 4 is the concrete structure schematic diagram of the pixel-driving circuit shown in Fig. 2；
The timing diagram of each signal used when Fig. 5 is for driving the pixel-driving circuit shown in Fig. 4；
Fig. 6 is the driving method flow chart for driving the pixel-driving circuit shown in Fig. 1 or Fig. 3；
Fig. 7 is the driving method flow chart for driving the pixel-driving circuit shown in Fig. 2 or Fig. 4.
Reference：
01- driver elements；The driver elements of 10- first；The driver elements of 11- second；101- drive modules；102- compensates mould
Block；103- initialization modules；20- luminescence units.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of pixel-driving circuit, as shown in figure 1, including at least one driver element 01 and hair
Light unit 20.Wherein, driver element 01 can include drive module 101, compensating module 102 and initialization module 103.
Specifically, the connection of luminescence unit 20 driver element 01, first voltage end ELVdd, second voltage end ELVss and the
One signal end S1, in a frame in, in driver element 01, first voltage end ELVdd, second voltage end ELVss and first
Lighted under signal end S1 control.
The connection of initialization module 103 drive module 102, initial voltage end Vint and the 4th signal end S4, for the
Under four signal end S4 control, drive module 101 is initialized by initial voltage end Vint.
The connection of compensating module 102 drive module 101, reference voltage end Vref, scanning signal end Vscan, data voltage end
Vdata and the 3rd signal end S3, for reference voltage end Vref, scanning signal end Vscan, data voltage end Vdata with
And the 3rd signal end S3 control under, threshold voltage vt h compensation is carried out to drive module 101.
Drive module 101 is also connected with luminescence unit 20 and secondary signal end S2, for the control in secondary signal end S2
Under, driving luminescence unit 20 is lighted.
The embodiment of the present invention provides a kind of pixel-driving circuit, including luminescence unit and at least one driver element.The drive
Moving cell includes drive module, compensating module and initialization module.Luminescence unit connection driver element, first voltage end, the
Two voltage ends and the first signal end, in a frame in, at driver element, first voltage end, second voltage end and first
Lighted under the control of signal end.Initialization module connection drive module, initial voltage end and the 4th signal end, for
Under the control of 4th signal end, drive module is initialized by initial voltage end.Compensating module connection drive module, ginseng
Voltage end, scanning signal end, data voltage end and the 3rd signal end are examined, in reference voltage end, scanning signal end, data
Under the control of voltage end and the 3rd signal end, the compensation of threshold voltage is carried out to drive module；Drive module is also connected with lighting
Unit and secondary signal end, under the control of the signal at secondary signal end, driving luminescence unit to be lighted.
So, during driver element drives luminescence unit luminous in a frame time, initialization module can be with
Drive module is initialized, prepared so as to carry out threshold voltage compensation to drive module for compensating module.Compensating module
The compensation of threshold voltage can be carried out to drive module so that drive module flows through hair when driving luminescence unit to carry out luminous
The electric current of light unit is unrelated with the threshold voltage of transistor, so as to eliminate influence of the threshold voltage to luminosity, improves
The brightness uniformity and brightness constancy of display.
From the foregoing, when carrying out luminous under driving of the luminescence unit 20 in an above-mentioned driver element 01, the driving
Unit 01 can be constantly in working condition, then the TFT in driver element 01, especially as the TFT president of driving transistor
Time is in the state of grid bias, the speed of TFT decay is accelerated, so as to reduce TFT service life.
In order to solve the above problems, above-mentioned pixel-driving circuit, as shown in Fig. 2 at least one above-mentioned driver element 01 is wrapped
Include the first driver element 10 and the second driver element 11.
Specifically, the first driver element 10 is used to be lighted in nth frame driving luminescence unit 20, wherein N >=1 is just
Integer；
Second driver element 11 is used to be lighted in N+1 frames driving luminescence unit 20.
Wherein, above-mentioned nth frame and above-mentioned N+1 frames are two adjacent frames.
So, the first driver element 10 and the second driver element 11 can be luminous single in two adjacent frame drivens
Member 20 is lighted, so as to avoid the state that the TFT in a driver element 01 is in gate bias for a long time, so as to carry
High TFT service life.
Further, above-mentioned luminescence unit 20 includes luminescent device L and the first transistor T1.
Luminescent device L anode connection first voltage end ELVdd and drive module 101, luminescent device L negative electrode connection
Drive module 101.Wherein, the luminescent device L in the present invention can include LED (Light Emitting in the prior art
Diode, light emitting diode) or OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) including it is many
Plant electric current driving luminescent device.In embodiments of the present invention, it is the explanation that is carried out by taking OLED as an example.
The first transistor T1 grid connects the first signal end S1, the first pole connection second voltage end ELVss, the second pole with
Drive module 101 is connected.
The modules in driver element 01 are described in detail below.
Specifically, as shown in figure 3, the drive module 101 in the driver element 01 includes the crystalline substances of second transistor T2 and the 3rd
Body pipe T3.
Wherein, second transistor T2 grid connection compensating module 102, the second of the first pole connection third transistor T3
Pole, the second pole is connected with initialization module 103.
Third transistor T3 grid connection secondary signal end S2, the first pole connection first voltage end ELVdd.
In addition, when luminescence unit 20 includes luminescent device L and the first transistor T1 as described above, above-mentioned luminescent device L
Anode connection third transistor T3 the first pole, luminescent device L negative electrode connection third transistor T3 the second pole.
Compensating module 102 can include the 4th transistor T4, the 5th transistor T5, the 6th transistor T6 and storage capacitance
C。
Specifically, the 4th transistor T4 grid connection scanning signal end Vscan, the first pole connection data voltage end
Vdata, the second pole connection storage capacitance C one end.
5th transistor T5 grid connection scanning signal end Vscan, the first pole connection reference voltage end Vref, the second pole
Connect drive module 101.Wherein, when the structure of the drive module 101 is as described above, the 5th transistor T5 the second pole is with driving
The grid of second transistor T2 in dynamic model block 101 is connected.
6th transistor T6 grid connects the 3rd signal end S3, and the first pole connects the 5th transistor T5 the second pole, the
Two poles connection storage capacitance C one end.
Storage capacitance C other end connection drive module 101.Wherein, when the structure of the drive module 101 is as described above
When, the storage capacitance C other end is connected with the second pole of the second transistor T2 in drive module 101.
Initialization module 103 includes the 7th transistor T7.7th transistor T7 grid connects the 4th signal end S4, the
One pole connects drive module 101, and the second pole is connected with initial voltage end Vint.Wherein, when the drive module 101 structure such as
When upper described, the second pole of the second transistor T2 in the 7th transistor T7 the first pole connection drive module 101.To sum up institute
State, the 7th transistor T7 the first pole and the first of the first transistor T1 extremely passes through the second of node b and second transistor T2
Pole is connected.
Hereinafter, the specific driving process of above-mentioned pixel-driving circuit is described in detail with reference to Fig. 4, Fig. 5.
It should be noted that the first, embodiment of the present invention is not done to the type of the transistor in modules and unit
Limit, i.e., above-mentioned the first transistor T1, second transistor T2, third transistor T3, the 4th transistor T4, the 5th transistor T5,
6th transistor T6 and the 7th transistor T7 can be for N-type transistor or P-type transistor.Below the embodiment of the present invention
It is the explanation carried out so that above-mentioned transistor is Type B transistor as an example.
Wherein, the first of above-mentioned transistor extremely can be drain electrode, second extremely can be source electrode；Or, first extremely can be
Source electrode, second extremely can be drain electrodes.The invention is not limited in this regard.
In addition, according to the difference of transistor conductivity mode, the transistor in above-mentioned image element circuit can be divided into enhanced
Transistor and depletion mode transistor.The invention is not limited in this regard.
Secondth, the embodiment of the present invention is with first voltage end ELVdd input high levels, second voltage end ELVss inputs
Low level, or the explanation that will be carried out exemplified by the ELVss groundings of second voltage end, also, here it is high and low only represent input
Relative size relation between voltage.
As shown in figure 5, each frame of the image element circuit shows that process can be divided into first stage P1, second stage P2 and the
Three stage P3.Specially：
P1, S1=0, S2=1, S3=0, S4=1, Vscan=1, Vdata=0 in the first stage；Wherein, the present invention is real
Apply in example " 0 " and represent low level, " 1 " represents high level.
In the case, the first signal end S1 exports low level, and the first transistor T1 is in cut-off state.Secondary signal end
S2 output high level turns on third transistor T3, because third transistor T3 the first pole connects luminescent device L anode, the
Two poles connection luminescent device L negative electrode, therefore luminescent device L negative electrode and anode in short circuit, in non-light emitting state.
The 4th transistor T4 and the 5th transistor T5 is turned in addition, scanning signal end Vscan exports high level, the 3rd letter
Number end S3 output low levels, the 6th transistor T6 cut-off.In the case, the data letter of data voltage end Vdata outputs
Number exported by the 4th transistor T4 to node a, the reference voltage of reference voltage Vref output is exported by the 5th transistor T5
To second transistor T2 grid, i.e. node c.In addition, the 4th signal end S4 output high level turns on the 7th transistor T7, from
And the voltage of initial voltage end Vint outputs is exported to second transistor T2 the second pole by the 7th transistor.In this feelings
Under condition, second transistor T2 is turned on.Working condition due to second transistor T2 for controlling luminescent device L, therefore second
Transistor T2 is driving transistor.In the case, second transistor T2 can be turned on, the voltage of reference voltage end Vref outputs
The voltage sum for needing the absolute value of the threshold voltage vt h more than second transistor T2 to be exported with initial voltage end Vint, i.e.,
Vref ＞ | Vth |+Vint.
In summary, the stage is initial phase, and its purpose is that the second transistor of driving transistor will be used as
T2 is turned on, and thinks in subsequent step and second transistor T2 threshold voltage vts h compensation is prepared.In addition the stage luminescent device
L does not light.
In second stage P2, S1=0, S2=1, S3=0, S4=0, Vscan=1, Vdata=1.
In the case, the first signal end S1 exports low level, and the first transistor T1 is in cut-off state.Secondary signal end
S2 output high level turns on third transistor T3, therefore luminescent device L negative electrode and anode in short circuit, in non-light emitting state.
In addition, the 3rd signal end S3 and the 4th equal input low levels of signal end S4, therefore the 6th transistor and the 7th crystal
Pipe is in cut-off state.
Now, second transistor T2 keeps opening on last stage, so as to proceed charging to node b,
Untill node b voltage Vb=Vref-Vth.And Vscan output high level in scanning signal end is by the 4th transistor T4 and the
Five transistor T5 are turned on.So that data voltage end Vdata voltage is exported to node c by the 4th transistor T4, therefore the section
Point c voltage Vc=Vdata.
In the case, the pressure difference at storage capacitance C two ends, i.e. Va-Vb=Vdata-Vref+Vth.
In summary, the stage is the threshold voltage compensation stage, and its purpose is the threshold value electricity to second transistor T2
Pressure is compensated, and the data voltage end Vdata data voltages inputted are write.In addition stage luminescent device L is not sent out
Light.
In phase III P3, S1=1, S2=0, S3=1, S4=0, Vscan=0, Vdata=0.
First signal end S1 exports high level, therefore the first transistor T1 is turned on.Scanning signal end Vscan inputs low electricity
It is flat, therefore the 4th transistor T4 and the 5th transistor T5 cut-offs.3rd signal end S3 exports high level, and the 6th transistor T6 is led
It is logical so that node c is connected with node a.In the case, as driving transistor second transistor T2 gate source voltage Vgs
Keep the value of P2 moment Mos on last stage, i.e. Vgs=Va-Vb=Vc-Vb=Vdata-Vref+Vth.
In addition, obtained as the second transistor T2 gate source voltage Vgs threshold voltage vt h for subtracting second transistor T2
When value is less than or equal to second transistor T2 drain source voltage Vds, i.e. during Vgs-Vth≤Vds, second transistor T2 is at
Saturation opening.The driving current I for then flowing through the second transistor T2 is：
I=K (Vgs-Vth)2
=K (Vdata-Vref+Vth-Vth)2
=K (Vdata-Vref)2。 (1)
Wherein, K is the current constant for being associated with second transistor T2, technological parameter and dimensioning with second transistor T2
It is very little relevant.
In the prior art, the Vth between different pixels unit is not quite similar, and the Vth in same pixel it is also possible to
Time drifts about, and this will cause display brightness difference.From above formula (1), for driving luminescent device L to be lighted
Driving current I it is unrelated with second transistor T2 threshold voltage vt h, so as to eliminate driving transistor (i.e. second transistor
T2 influences of the threshold voltage vt h to luminescent device L luminosity), improves the homogeneity of luminescent device brightness.
In summary, the stage is glow phase, and its purpose is to drive luminescent device L to be lighted, and for driving
The driving current I that dynamic luminescent device L is lighted is unrelated with second transistor T2 threshold voltage vt h.
The embodiment of the present invention provides a kind of display device, including any one pixel-driving circuit as described above.It is described
Display device can include multiple pixel unit arrays, and each pixel cell includes any one pixel driver as described above
Circuit.With the pixel-driving circuit identical beneficial effect provided with present invention, due to pixel-driving circuit
Have been carried out describing in detail in the aforementioned embodiment, here is omitted.
Specifically, the display device that the embodiment of the present invention is provided can include light-emitting diode display or OLED display exists
The interior display device with electric current driving luminescent device.
The embodiment of the present invention provides a kind of for driving the luminous of any one above-mentioned pixel-driving circuit, as shown in fig. 6,
This method can include：
S101, as shown in figure 5, in the first stage P1 of a frame, the initialization module of driver element 01 as shown in Figure 1
103 are opened, and the drive module 101 to the driver element 01 is initialized.
S102, the second stage P2 in a frame, above-mentioned initialization module 103 are closed, the compensating module of the driver element 01
102 pairs of above-mentioned drive modules 01 carry out threshold voltage compensation.
S103, the phase III P3 in a frame, above-mentioned initialization module 103 are closed, and the drive module 101 driving is luminous single
Member 20 is lighted.
So, during driver element drives luminescence unit luminous in a frame time, initialization module can be with
Drive module is initialized, prepared so as to carry out threshold voltage compensation to drive module for compensating module.Compensating module
The compensation of threshold voltage can be carried out to drive module so that drive module flows through hair when driving luminescence unit to carry out luminous
The electric current of light unit is unrelated with the threshold voltage of transistor, so as to eliminate influence of the threshold voltage to luminosity, improves
The brightness uniformity and brightness constancy of display.
Further, when at least one driver element 01 in above-mentioned pixel-driving circuit includes the He of the first driver element 10
During the second driver element 11, the driving method is as shown in fig. 7, can include：
S201, the first stage P1 in nth frame, the initialization module 103 of the first driver element 10 are opened, and are driven to first
The drive module 101 of unit 10 is initialized, wherein N >=1, is positive integer.
Specifically, first stage P1, S1=0, S2=1, S3=0, the S4=1 of nth frame (Frame N) as shown in Figure 5,
Vscan=1, Vdata=0.
The first driver element 10 concrete structure as shown in Figure 3 or Figure 4, i.e., drive module 101 include second transistor
T2 and third transistor T3, compensating module 102 can include the 4th transistor T4, the 5th transistor T5, the 6th transistor T6 with
And storage capacitance C, in the case that initialization module 103 includes the 7th transistor T7, the first signal end S1 output low levels, first
Transistor T1 is in cut-off state.S2 output high level in secondary signal end turns on third transistor T3, due to third transistor
T3 the first pole connection luminescent device L anode, the second pole connection luminescent device L negative electrode, therefore luminescent device L negative electrode and
Anode in short circuit, in non-light emitting state.
The 4th transistor T4 and the 5th transistor T5 is turned in addition, scanning signal end Vscan exports high level, the 3rd letter
Number end S3 output low levels, the 6th transistor T6 cut-off.In the case, the data letter of data voltage end Vdata outputs
Number exported by the 4th transistor T4 to node a, the reference voltage of reference voltage Vref output is exported by the 5th transistor T5
To second transistor T2 grid, i.e. node c.In addition, the 4th signal end S4 output high level turns on the 7th transistor T7, from
And the voltage of initial voltage end Vint outputs is exported to second transistor T2 the second pole by the 7th transistor.In this feelings
Under condition, second transistor T2 is turned on.Working condition due to second transistor T2 for controlling luminescent device L, therefore second
Transistor T2 is driving transistor.In the case, second transistor T2 can be turned on, the voltage of reference voltage end Vref outputs
The voltage sum for needing the absolute value of the threshold voltage vt h more than second transistor T2 to be exported with initial voltage end Vint, i.e.,
Vref ＞ | Vth |+Vint.
In summary, the stage is initial phase, and its purpose is that the second transistor of driving transistor will be used as
T2 is turned on, and thinks in subsequent step and second transistor T2 threshold voltage vts h compensation is prepared.In addition the stage luminescent device
L does not light.
S202, the second stage P2 in nth frame, the initialization module 103 of the first driver element 10 are closed, and the first driving is single
The drive module 101 of 102 pair of first driver element 10 of compensating module of member 10 carries out threshold voltage compensation.
Specifically, the second stage P2, S1=0, S2=1, S3=0, S4=0, Vscan=1, Vdata=1 of nth frame.
In the case, the first signal end S1 exports low level, and the first transistor T1 is in cut-off state.Secondary signal end
S2 output high level turns on third transistor T3, therefore luminescent device L negative electrode and anode in short circuit, in non-light emitting state.
In addition, the 3rd signal end S3 and the 4th equal input low levels of signal end S4, therefore the 6th transistor and the 7th crystal
Pipe is in cut-off state.
Now, second transistor T2 keeps opening on last stage, so as to proceed charging to node b,
Untill node b voltage Vb=Vref-Vth.And Vscan output high level in scanning signal end is by the 4th transistor T4 and the
Five transistor T5 are turned on.So that data voltage end Vdata voltage is exported to node c by the 4th transistor T4, therefore the section
Point c voltage Vc=Vdata.
In the case, the pressure difference at storage capacitance C two ends, i.e. Va-Vb=Vdata-Vref+Vth.
In summary, the stage is the threshold voltage compensation stage, and its purpose is the threshold value electricity to second transistor T2
Pressure is compensated, and the data voltage end Vdata data voltages inputted are write.In addition stage luminescent device L is not sent out
Light.
S203, the phase III P3 in nth frame, the initialization module 103 of the first driver element 10 are closed, and the first driving is single
The driving luminescence unit 20 of drive module 10 of member 10 is lighted.
Specifically, the phase III P3, S1=1, S2=0, S3=1, S4=0, Vscan=0, Vdata=0 of nth frame.
First signal end S1 exports high level, therefore the first transistor T1 is turned on.Scanning signal end Vscan inputs low electricity
It is flat, therefore the 4th transistor T4 and the 5th transistor T5 cut-offs.3rd signal end S3 exports high level, and the 6th transistor T6 is led
It is logical so that node c is connected with node a.In the case, as driving transistor second transistor T2 gate source voltage Vgs
Keep the value of P2 moment Mos on last stage, i.e. Vgs=Va-Vb=Vc-Vb=Vdata-Vref+Vth.
In addition, obtained as the second transistor T2 gate source voltage Vgs threshold voltage vt h for subtracting second transistor T2
When value is less than or equal to second transistor T2 drain source voltage Vds, i.e. during Vgs-Vth≤Vds, second transistor T2 is at
Saturation opening.The driving current I for then flowing through the second transistor T2 is：
I=K (Vgs-Vth)2
=K (Vdata-Vref+Vth-Vth)2
=K (Vdata-Vref)2。 (1)
Wherein, K is the current constant for being associated with second transistor T2, technological parameter and dimensioning with second transistor T2
It is very little relevant.
In the prior art, the Vth between different pixels unit is not quite similar, and the Vth in same pixel it is also possible to
Time drifts about, and this will cause display brightness difference.From above formula (1), for driving luminescent device L to be lighted
Driving current I it is unrelated with second transistor T2 threshold voltage vt h, so as to eliminate driving transistor (i.e. second transistor
T2 influences of the threshold voltage vt h to luminescent device L luminosity), improves the homogeneity of luminescent device brightness.
In summary, the stage is glow phase, and its purpose is to drive luminescent device L to be lighted, and for driving
The driving current I that dynamic luminescent device L is lighted is unrelated with second transistor T2 threshold voltage vt h.
Further, when pixel-driving circuit as shown in figures 2 or 4, including during the second driver element 11, above-mentioned driving side
Method is as shown in fig. 7, can also include：
S204, the first stage P1 in N+1 frames, the initialization module 103 of the second driver element 11 are opened, and are driven to second
The drive module 101 of moving cell 11 is initialized.
Specifically, as shown in Figure 5 in the first stage P1, S1=0, S2 of N+1 frames '=1, S3 '=0, S4 '=1, Vscan '
=1, Vdata '=0.
The second driver element 11 concrete structure as shown in Figure 3 or Figure 4, i.e., drive module 101 include second transistor
T2 and third transistor T3, compensating module 102 can include the 4th transistor T4, the 5th transistor T5, the 6th transistor T6 with
And storage capacitance C, in the case that initialization module 103 includes the 7th transistor T7, with the first driver element 10 the of nth frame
One stage P1 operation principle is identical, and the stage is initial phase, and its purpose is that the second of driving transistor will be used as
Transistor T2 is turned on, and thinks in subsequent step and second transistor T2 threshold voltage vts h compensation is prepared.In addition the stage is sent out
Optical device L does not light.
It should be noted that because the first driver element 10 is lighted in N frames driving luminescence unit 20, the second driving is single
Member 11 is lighted in N+1 frames driving luminescence unit 20.Therefore will for convenience of explanation in following examples and accompanying drawing
The above-mentioned signal end being connected with the second driver element 11 is respectively labeled as secondary signal end S2 ', the 3rd signal end S3 ', the 4th
Signal end S4 ', scanning signal end Vscan ' and data voltage end Vdata '.Wherein, above-mentioned nth frame is with above-mentioned N+1 frames
Two adjacent frames.
S205, the second stage P2 in N+1 frames, the initialization module 103 of the second driver element 11 are closed, the second driving
The drive module 101 of 102 pair of second driver element 11 of compensating module of unit 11 carries out threshold voltage compensation.
Specifically, in the second stage P2, S1=0, S2 of N+1 frames '=1, S3 '=0, S4 '=0, Vscan '=1,
Vdata '=1.
Identical in the second stage P2 of nth frame operation principle with the first driver element 10, the stage mends for threshold voltage
The stage is repaid, its purpose is to compensate second transistor T2 threshold voltage, and data voltage end Vdata is inputted
Data voltage is write.In addition stage luminescent device L does not light.
S206, the phase III P3 in N+1 frames, the initialization module 103 of the second driver element 11 are closed, the second driving
The driving luminescence unit 20 of drive module 101 of unit 11 is lighted.
Specifically, in the phase III P3, S1=1, S2 of N+1 frames '=0, S3 '=1, S4 '=0, Vscan '=0,
Vdata '=0.
Identical in the phase III P3 of nth frame operation principle with the first driver element 10, the stage is glow phase, its
Purpose be drive luminescent device L lighted, and be used for drive the driving current I and second that luminescent device L is lighted
Transistor T2 threshold voltage vt h is unrelated.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
1. a kind of pixel-driving circuit, it is characterised in that including luminescence unit and at least one driver element, the driver element
Including drive module, compensating module and initialization module；
The luminescence unit connects the driver element, first voltage end, second voltage end and the first signal end, for one
Frame in, enters under the control of the driver element, the first voltage end, the second voltage end and first signal end
Row is luminous；
The initialization module connects the drive module, initial voltage end and the 4th signal end, in the described 4th letter
Number end control under, the drive module is initialized by the initial voltage end；
The compensating module connects the drive module, reference voltage end, scanning signal end, data voltage end and the 3rd signal
End, for the control in the reference voltage end, the scanning signal end, the data voltage end and the 3rd signal end
Under, the compensation of threshold voltage is carried out to the drive module；
The drive module is also connected with the luminescence unit and secondary signal end, for the control at the secondary signal end
Under, drive the luminescence unit to be lighted；
The drive module includes second transistor and third transistor；The grid of the second transistor connects the compensation mould
Block, the first pole connects the second pole of the third transistor, and the second pole is connected with the initialization module；3rd crystal
The grid of pipe connects the secondary signal end, and the first pole connects the first voltage end；
The initialization module includes the 7th transistor；The grid of 7th transistor connects the 4th signal end, first
Pole connects the drive module, and the second pole is connected with the initial voltage end.
2. pixel-driving circuit according to claim 1, it is characterised in that at least one described driver element includes first
Driver element and the second driver element；
First driver element is used to drive the luminescence unit to be lighted in nth frame, wherein N >=1, is positive integer；
Second driver element is used to drive the luminescence unit to be lighted in N+1 frames；
Wherein, the nth frame and the N+1 frames are two adjacent frames.
3. pixel-driving circuit according to claim 1, it is characterised in that the luminescence unit includes luminescent device and the
One transistor；
The anode of the luminescent device connects the first voltage end and the drive module, the negative electrode connection of the luminescent device
The drive module；
The grid of the first transistor connects first signal end, and the first pole connects the second voltage end, the second pole with
The drive module is connected.
4. pixel-driving circuit according to claim 1, it is characterised in that the compensating module include the 4th transistor,
5th transistor, the 6th transistor and storage capacitance；
The grid of 4th transistor connects the scanning signal end, and the first pole connects the data voltage end, and the second pole connects
Connect one end of the storage capacitance；
The grid of 5th transistor connects the scanning signal end, and the first pole connects the reference voltage end, and the second pole connects
Connect the drive module；
The grid of 6th transistor connects the 3rd signal end, and the first pole connects the second pole of the 5th transistor,
Second pole connects one end of the storage capacitance；
The other end of the storage capacitance connects the drive module.
5. pixel-driving circuit according to claim 3, it is characterised in that the luminescent device is organic light-emitting diodes
Pipe.
6. a kind of display device, it is characterised in that including the pixel-driving circuit as described in claim any one of 1-5.
7. a kind of method for being used to drive the pixel-driving circuit as described in claim any one of 1-5, it is characterised in that described
Method includes：
In the first stage of a frame, the initialization module of driver element is opened, and the drive module to the driver element is carried out initially
Change；
In the second stage of a frame, the initialization module is closed, and the compensating module of the driver element enters to the drive module
Row threshold voltage compensation；
In the phase III of a frame, the initialization module is closed, and the drive module driving luminescence unit is lighted.
8. the method for pixel-driving circuit according to claim 7, it is characterised in that when at least one driver element
Including the first driver element and during the second driver element, the driving method includes：
In the first stage of nth frame, the initialization module of first driver element is opened, the drive to first driver element
Dynamic model block is initialized, wherein N >=1, is positive integer；
In the second stage of nth frame, the initialization module of first driver element is closed, the compensation of first driver element
Module carries out threshold voltage compensation to the drive module of first driver element；
In the phase III of nth frame, the initialization module of first driver element is closed, the driving of first driver element
Luminescence unit is lighted described in module drive；
In the first stage of N+1 frames, the initialization module of second driver element is opened, to second driver element
Drive module is initialized；
In the second stage of N+1 frames, the initialization module of second driver element is closed, the benefit of second driver element
Repay module and threshold voltage compensation is carried out to the drive module of second driver element；
In the phase III of N+1 frames, the initialization module of second driver element is closed, the drive of second driver element
Luminescence unit described in dynamic module drive is lighted；
Wherein, the nth frame and the N+1 frames are two adjacent frames.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510680325.3A CN105139805B (en) | 2015-10-19 | 2015-10-19 | A kind of pixel-driving circuit and its driving method, display device |
| US15/200,220 US10235940B2 (en) | 2015-10-19 | 2016-07-01 | Pixel-driving circuit, the driving method thereof, and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510680325.3A CN105139805B (en) | 2015-10-19 | 2015-10-19 | A kind of pixel-driving circuit and its driving method, display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105139805A CN105139805A (en) | 2015-12-09 |
| CN105139805B true CN105139805B (en) | 2017-09-22 |
Family
ID=54725128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510680325.3A Active CN105139805B (en) | 2015-10-19 | 2015-10-19 | A kind of pixel-driving circuit and its driving method, display device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US10235940B2 (en) |
| CN (1) | CN105139805B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106067291A (en) * | 2016-08-18 | 2016-11-02 | 成都京东方光电科技有限公司 | A kind of pixel-driving circuit and driving method, display device |
| CN106652908B (en) * | 2017-01-05 | 2019-03-12 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and its driving method, organic light-emitting display device |
| CN106531085B (en) * | 2017-01-05 | 2019-05-24 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and its driving method, organic light-emitting display device |
| CN106558287B (en) * | 2017-01-25 | 2019-05-07 | 上海天马有机发光显示技术有限公司 | Organic light emissive pixels driving circuit, driving method and organic light emitting display panel |
| KR102347796B1 (en) * | 2017-05-31 | 2022-01-07 | 엘지디스플레이 주식회사 | Electroluminescence display |
| CN107731163B (en) | 2017-10-30 | 2019-10-18 | 合肥鑫晟光电科技有限公司 | Pixel-driving circuit and its driving method, display device |
| CN108717841B (en) * | 2018-05-29 | 2020-07-28 | 京东方科技集团股份有限公司 | Pixel driving circuit, pixel driving method, O L ED display panel, and driving circuit and driving method thereof |
| CN110189691B (en) * | 2019-05-14 | 2021-03-16 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display panel |
| CN110570813A (en) * | 2019-09-30 | 2019-12-13 | 昆山国显光电有限公司 | pixel circuit, driving method and display panel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577453A (en) * | 2003-07-07 | 2005-02-09 | 三星Sdi株式会社 | Organic light emitting device pixel circuit and driving method therefor |
| CN101937647A (en) * | 2010-09-02 | 2011-01-05 | 上海交通大学 | Complementary driving type pixel circuit |
| CN104021763A (en) * | 2014-06-11 | 2014-09-03 | 合肥鑫晟光电科技有限公司 | Pixel circuit, display device and drive method of pixel circuit |
| CN104157241A (en) * | 2014-08-15 | 2014-11-19 | 合肥鑫晟光电科技有限公司 | Pixel drive circuit and drive method thereof and display device |
| CN104299571A (en) * | 2014-11-06 | 2015-01-21 | 合肥鑫晟光电科技有限公司 | Pixel circuit, organic electroluminescent display panel and display device |
| CN104464636A (en) * | 2014-10-01 | 2015-03-25 | 友达光电股份有限公司 | Pixel driving circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009110132A1 (en) * | 2008-03-06 | 2009-09-11 | 富士電機ホールディングス株式会社 | Active matrix display device |
| WO2013054533A1 (en) * | 2011-10-14 | 2013-04-18 | パナソニック株式会社 | Image display device |
| KR101341797B1 (en) * | 2012-08-01 | 2013-12-16 | 엘지디스플레이 주식회사 | Organic light emitting diode display device and method for driving the same |
| KR101965724B1 (en) * | 2012-10-18 | 2019-04-04 | 삼성디스플레이 주식회사 | Emitting driver for display device, display device and driving method thereof |
| KR102043980B1 (en) * | 2013-05-13 | 2019-11-14 | 삼성디스플레이 주식회사 | Pixel and organic light emitting display device using the same |
| KR102241704B1 (en) * | 2014-08-07 | 2021-04-20 | 삼성디스플레이 주식회사 | Pixel circuit and organic light emitting display device having the same |
| KR102300884B1 (en) * | 2015-04-28 | 2021-09-10 | 삼성디스플레이 주식회사 | Organic light emitting diode display |
-
2015
- 2015-10-19 CN CN201510680325.3A patent/CN105139805B/en active Active
-
2016
- 2016-07-01 US US15/200,220 patent/US10235940B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577453A (en) * | 2003-07-07 | 2005-02-09 | 三星Sdi株式会社 | Organic light emitting device pixel circuit and driving method therefor |
| CN101937647A (en) * | 2010-09-02 | 2011-01-05 | 上海交通大学 | Complementary driving type pixel circuit |
| CN104021763A (en) * | 2014-06-11 | 2014-09-03 | 合肥鑫晟光电科技有限公司 | Pixel circuit, display device and drive method of pixel circuit |
| CN104157241A (en) * | 2014-08-15 | 2014-11-19 | 合肥鑫晟光电科技有限公司 | Pixel drive circuit and drive method thereof and display device |
| CN104464636A (en) * | 2014-10-01 | 2015-03-25 | 友达光电股份有限公司 | Pixel driving circuit |
| CN104299571A (en) * | 2014-11-06 | 2015-01-21 | 合肥鑫晟光电科技有限公司 | Pixel circuit, organic electroluminescent display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20170110056A1 (en) | 2017-04-20 |
| US10235940B2 (en) | 2019-03-19 |
| CN105139805A (en) | 2015-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105139805B (en) | A kind of pixel-driving circuit and its driving method, display device | |
| CN104700780B (en) | A kind of driving method of image element circuit | |
| CN104485071B (en) | Image element circuit and its driving method and active matrix/organic light emitting display | |
| CN103700342B (en) | OLED pixel circuit and driving method, display device | |
| CN104465715B (en) | Image element circuit, driving method, display panel and display device | |
| CN104409047B (en) | Pixel driving circuit, pixel driving method and display device | |
| CN103971640B (en) | A kind of pixel-driving circuit and driving method thereof and display device | |
| CN104464641B (en) | Image element circuit and its driving method and active array organic light emitting display device | |
| CN104036725B (en) | Image element circuit and its driving method, organic electroluminescence display panel and display device | |
| CN103400548B (en) | Pixel-driving circuit and driving method, display device | |
| CN104318900B (en) | A kind of organic electroluminescence display device and method of manufacturing same and method | |
| CN103943067B (en) | Pixel circuit, driving method thereof and display device | |
| US10283042B2 (en) | Pixel driving circuit, pixel driving method, and display device | |
| CN107358918A (en) | A kind of image element circuit and its driving method, display device | |
| CN102651196B (en) | Drive circuit and drive method of AMOLED (Active Matrix Organic Light-Emitting Diode), and display device | |
| CN106067291A (en) | A kind of pixel-driving circuit and driving method, display device | |
| CN105096817A (en) | Pixel circuit and driving method thereof as well as display apparatus | |
| CN106652903A (en) | OLED pixel circuit, driving method of OLED pixel circuit and display device | |
| CN105427805A (en) | Pixel driving circuit and method, display panel, and display apparatus | |
| CN103077680A (en) | Organic light-emitting diode (OLE) pixel driving circuit | |
| CN102708785A (en) | Pixel unit circuit, working method therefore and organic light emitting diode (OLED) display device | |
| CN103198793A (en) | Pixel circuit, drive method and display device thereof | |
| CN106782322A (en) | AMOLED pixel-driving circuits and AMOLED image element driving methods | |
| CN202067514U (en) | Voltage current conversion circuit, data driving circuit, current driving pixel circuit and panel displayer | |
| CN107369412B (en) | Pixel circuit, driving method thereof and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |